已经研究了设计用于结合磷脂酰甘油(PG)的磷酸根阴离子部分和甘油羟基的四种脲基卟啉的脂质结合能力。等温滴定热法(ITC)和11 H NMR用于确定受体的结合化学计量,缔合常数以及与PG阴离子结合的焓和熵。光谱证据表明PG的磷酸根阴离子部分是氢键合到受体的脲基上。这种结合相互作用使受体袋中的PG阴离子取向,从而使其甘油羟基可以与第三个尿素基对齐,并且提供的结果表明确实发生了这种多功能相互作用。发现整个纠察队的结构影响脂质结合的焓和熵。还介绍了四丁铵磷脂酰甘油(TBAPG)的合成以及其头基的详细光谱特征。
Pharmaceutical compositions containing active agents having a lactone group and transition metal ions
申请人:Tardi Paul
公开号:US20060193902A1
公开(公告)日:2006-08-31
Compositions and methods for stabilizing an active agent containing one or more actone rings. The compositions, including pharmaceutical compositions, ensure that the lactone ring of the active agent is stabilized in the active, ring-closed form due to the inclusion of a transition metal ion.
A novel composition and method for solubilizing amphiphilic drugs in a small amount of organic solvent for use in improved liposomes is disclosed. A phosphatidylglycerol is acidified in a small amount of organic solvent. The amphiphilic drug, such as Amphotericin B, suspended in organic solvent is then added to the acidified phosphatidylycerol and a soluble complex is formed between the phosphatidylglycerol and the amphiphilic drug. When the liposome composition incorporating the soluble complex is hydrated, the final pH of the hydrating aqueous buffer is carefully controlled. The Amphotericin B liposomes formed have markedly reduced toxicity.
The present invention provides a clinically applicable, safe and convenient, pharmaceutical composition for disease site-specific treatment. The pharmaceutical composition for disease site-specific treatment comprises a stealth liposome having a prostaglandin I2 receptor agonist encapsulated therein.
Liposomal Delivery Systems for Oxaliplatin and in Dual Drug Delivery in Combination with Chemo-sensitizing and Chemo-therapeutic agents
申请人:THE AMERICAN UNIVERSITY IN CAIRO
公开号:US20190307690A1
公开(公告)日:2019-10-10
A liposomal delivery composition to be administered through intravenous injection is provided for the treatment of cancer. The delivery composition has a liposome composition with therein encapsulated a first cancer drug (e.g. oxaliplatin) and a second cancer drug (e.g. ascorbic acid or satraplatin). The liposomal delivery composition has negative surface potentials resulting in an encapsulation efficiency for e.g. of oxaliplatin of about 20-25%. The liposomal delivery composition has a particle size of less than 200 nm. The liposomal delivery offers protection of the drug cargo, which reduces their non-intentional and non-pharmacological interactions thus reducing side effects and increases efficacy. Increased efficacy reduces the amount of drug given to a patient, which would reduce healthcare cost. The combinatory approach of two different drug cargos within the same liposome delivery composition allows for the synergistic action of these drugs.